Yaskawa Z1000U HVAC Matrix Bypass - Manual (Page 42)

Present Value Access ..................................................................................................................... 369
Supported Properties of Objects ..................................................................................................... 369
Analog Input Objects ....................................................................................................................... 370
Analog Output Objects .................................................................................................................... 370
Analog Value Objects...................................................................................................................... 370
Binary Input Objects ........................................................................................................................ 371
Binary Output Objects ..................................................................................................................... 372
Binary Value Objects....................................................................................................................... 372
Device Object .................................................................................................................................. 374
C.7 Accessing Bypass Parameters and the Enter Command .............................................376
Reading Bypass Parameters........................................................................................................... 376
Writing Bypass Parameters............................................................................................................. 376
Enter Command .............................................................................................................................. 376
C.8 Communication Errors .....................................................................................................377
C.9 BACnet Protocol Implementation Conformance Statement..........................................378
D. MEMOBUS/MODBUS COMMUNICATIONS........................................................ 381
D.1 MEMOBUS/Modbus Configuration ..................................................................................382
D.2 Communication Specifications........................................................................................383
D.3 Connecting to a Network ..................................................................................................384
Network Cable Connection.............................................................................................................. 384
Wiring Diagram for Multiple Connections ........................................................................................ 385
Network Termination ....................................................................................................................... 385
D.4 MEMOBUS/Modbus Setup Parameters ...........................................................................386
MEMOBUS/Modbus Serial Communication.................................................................................... 386
D.5 Bypass Operations by MEMOBUS/Modbus....................................................................388
Observing the Bypass Operation .................................................................................................... 388
D.6 Communications Timing...................................................................................................389
Command Messages from Master to Bypass ................................................................................. 389
Response Messages from Bypass to Master.................................................................................. 389
D.7 Message Format ................................................................................................................390
Message Content ............................................................................................................................ 390
Slave Address ................................................................................................................................. 390
Function Code ................................................................................................................................. 390
Data................................................................................................................................................. 390
Error Check ..................................................................................................................................... 390
D.8 Message Examples ...........................................................................................................392
Reading Drive MEMOBUS/Modbus Register Contents .................................................................. 392
Loopback Test................................................................................................................................. 392
Writing to Multiple Registers............................................................................................................ 393
D.9 MEMOBUS/Modbus Data Table........................................................................................394
Command Data ............................................................................................................................... 394
Monitor Data.................................................................................................................................... 395
Broadcast Messages....................................................................................................................... 407
Fault Trace Contents....................................................................................................................... 408
Bypass Fault Codes ........................................................................................................................ 410
Alarm Register Contents ................................................................................................................. 410
D.10 Enter Command.................................................................................................................412
Enter Command Behavior ............................................................................................................... 412
Table of Contents
42 YASKAWA SIEP YAIZ1D 01A Z1000U HVAC MATRIX Drive Bypass Technical Manual